Piece of advice buddy, there's no such thing as cloud based mining. The only legit mining site so far is Genesis Mining which provide details and actual screenshot of their mining farm and its actual location.
There are actually a few legit cloud mining companies.
Genesis Mining
Bitcoin.com
Hashnest
The only way to make money on these contracts is by the coin price rising so there is an opportunity to make a profit but the margins are very slim.
Your last sentence is the only one that I agree with as I do not consider any cloud mining operation as legit. While they may not have blatantly closed down and ran off with everyone's money like Auroramine did, they are a far cry from a good investment.
For one, they got lucky that the coin prices have risen as much as they have in the past year, thus making it appear they are profitable. I suspect in many of those cases if people who would have instead invested that same amount directly into a coin would have came out much further ahead.
Another is that almost all of them have some clause in the cloud mining contract that states the moment a coins profits drop below production (mining) costs, they have the right to terminate the contract and consider it as having been fulfilled. This means that if the coins profits had went the other way instead, you would be at a net loss. Again the general increase of the market in the past year helped avoid this, but if you look back to the 2014 and 2015 years many people bought cloud mining contracts and never even ROI'd on their investment.
A lot of sins (crimes) can be effectively hidden from sight during an uptrend in the market, as the profits are not coming so much the cloud mining as they are from the general appreciation of the market. I expect the same is true for many exchanges and other investments such as ICOs. I believe if Bitcoin and Alts were to experience a violent and sustained downtrend, on the order of a 70-80% correction lasting a year plus similar to the 2014-2015 years, many of these fraudulent practices would be exposed for what they truly are. Think Mt Gox times 100 as such an event could very well spell the end of Crypocurrecnies as we know it.